TGC REPORT No . 31, 1981 RESEARCH NOTES 8 Kerr,E . A . Yellow green - 2 (yg - 2) and In 1958, Burdick (TGC 8:10) reported a auroid ( aud) are alleles . yellow green mutation, yg - 282, obtained by thermal irradiation from L . pimpinellifolium . The designation of this mutant was later changed by the Gene List Committee to yg - 2 (TGC 10:3) . In 1968, Rick, Reeves and Zobel (TGC 18:34 - 35) reported in a breeding line a spontaneous bright yellow mutant designated auroid (aud) . This mutant showed linkage with alb and fd on chromosome 12 . Kerr (TGC 29:26 - 28) presented data indicating linkage of yg - 2 with alb and that yg - 2 and aud were approximately the same distance from hp . The mutants aud and yg - 2 could not be differentiated with certainty in our trials . In such a case there is always the remote possibility that someone has goofed . Accordingly, seed of aud was obtained from Rick and yg - 2 from Robinson . All combinations of aud (Rick), yg - 2 (Robinson) and yg - 2 (Kerr) were produced, and F 1 's grown . In each case, the F 's were indistinguishable from each other and from the parents . The original descriptions of yg - 2 and aud indicate that the hypocotyl of yg - 2 is elongated but that of aud is normal . This difference was not always evident under our conditions . Since the name and symbol yellow green - 2 ( yg - 2) has precedence, the designation of aud should be changed to yg - 2 r to indicate their allelism and the discovery of aud by Rick . Kesicki, E . Enigmas of species crossing Nearly all published papers concerning in Lycopersicon . hybrids between red - and green - fruited tomato species contain information that such hybrids are self - incompatible and have small yellow or orange fruits . Thus, I was surprised that some plants I obtained after crossing L . esculentum cv . Potentate with L . peruvianum PI 126435 had rather large and red fruits (TGC 29) . The plants resembled L . esculentum in other characters also, but differed distinctly from the mother variety Potentate . Some plants with red fruits had bracts, pseudostipules or long hair on the fruits which suggested they were hybrids .